Stuck Brake Caliper?

I have a 1975 Dodge Dart Sport, with front disc and rear drum brakes. I was driving this past weekend and out the blue my car starts shaking violently (I was doing about 45mph when it started). I managed to get her home safe as at 20-30mph the shake was minimal (but still present). When I got back to the garage I noticed brake fluid had sprayed out of my master cylinder under the hood - I am thinking I have a stuck caliper which was now warped the brake rotor - but any additional help is appreciated as it could be another issue with suspension or ???.

Thanks mopar community.